<template>
  <br>
  <h3 style="color: red"><strong>{{title}}</strong></h3> <br>

</template>

<script>
export default {
  name: "Demo",
  data(){
    return{
      title:"18.侦听器 监听页面的变化 watch 侦听函数名与变量名必须一致"
    }
  }
}
</script>

<style scoped>

</style>